Research
Fermented soy and mortality: an association, not a prescription.
A Japanese cohort study is informative, but it cannot establish that eating natto causes longer life.
A three-year nattokinase trial found no effect on its main vascular measures.
A randomized study helps put the supplement claims in perspective.
Fermented foods and the microbiome: what a small trial can tell us.
An interesting dietary-pattern study, not a natto-only experiment.
Vitamin K: essential nutrient, careful context.
What a nutrient does is not the same as what one food has been proven to prevent.
Mapping the microbes in kinema.
A research window into a related fermented soybean tradition.